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Aliases LRRC8A, AGM5, LRRC8, SWELL1, leucine-rich repeat containing 8 family member A, leucine rich repeat containing 8 family member A, leucine rich repeat containing 8 VRAC subunit A
External IDs MGI: 2652847 HomoloGene: 18617 GeneCards: LRRC8A
Gene location (Human)
Chromosome 9 (human)
Chr. Chromosome 9 (human)[1]
Chromosome 9 (human)
Genomic location for LRRC8A
Genomic location for LRRC8A
Band 9q34.11 Start 128,882,112 bp[1]
End 128,918,039 bp[1]
Species Human Mouse
RefSeq (mRNA)



RefSeq (protein)



Location (UCSC) Chr 9: 128.88 – 128.92 Mb Chr 9: 30.24 – 30.26 Mb
PubMed search [3] [4]
View/Edit Human View/Edit Mouse

Leucine-rich repeat-containing protein 8A is a protein that in humans is encoded by the LRRC8A gene.[5] Researchers have found out that this protein, along with the other LRRC8 proteins LRRC8B, LRRC8C, LRRC8D, and LRRC8E, is a subunit of the heteromer protein Volume-Regulated Anion Channel.[6] Volume-Regulated Anion Channels (VRACs) are crucial to the regulation of cell size by transporting chloride ions and various organic osmolytes, such as taurine or glutamate, across the plasma membrane,[7] and that is not the only function these channels have been linked to.

While LRRC8A is one of many proteins that can be part of VRAC, it is the most important subunit for the channel’s ability to function.[8][9] However, while we know it is necessary for VRAC function, other studies have found that it is not sufficient for the full range of usual VRAC activity.[10] This is where the other LRRC8 proteins come in, as the different composition of these subunits affects the range of specificity for VRACs.[11][12]

In addition to its role in VRACs, the LRRC8 protein family is also associated with agammaglobulinemia-5.[13]


  1. ^ a b c GRCh38: Ensembl release 89: ENSG00000136802 - Ensembl, May 2017
  2. ^ a b c GRCm38: Ensembl release 89: ENSMUSG00000007476 - Ensembl, May 2017
  3. ^ "Human PubMed Reference:". 
  4. ^ "Mouse PubMed Reference:". 
  5. ^ "Entrez Gene: LRRC8A leucine rich repeat containing 8 family, member A". 
  6. ^ Voss FK, Ullrich F, Münch J, Lazarow K, Lutter D, Mah N, Andrade-Navarro MA, von Kries JP, Stauber T, Jentsch TJ (May 2014). "Identification of LRRC8 heteromers as an essential component of the volume-regulated anion channel VRAC". Science. 344 (6184): 634–8. doi:10.1126/science.1252826. PMID 24790029. 
  7. ^ Jentsch TJ (May 2016). "VRACs and other ion channels and transporters in the regulation of cell volume and beyond". Nature Reviews. Molecular Cell Biology. 17 (5): 293–307. doi:10.1038/nrm.2016.29. PMID 27033257. 
  8. ^ Hyzinski-García MC, Rudkouskaya A, Mongin AA (November 2014). "LRRC8A protein is indispensable for swelling-activated and ATP-induced release of excitatory amino acids in rat astrocytes". The Journal of Physiology. 592 (22): 4855–62. doi:10.1113/jphysiol.2014.278887. PMC 4259531Freely accessible. PMID 25172945. 
  9. ^ Yamada T, Wondergem R, Morrison R, Yin VP, Strange K (October 2016). "Leucine-rich repeat containing protein LRRC8A is essential for swelling-activated Cl- currents and embryonic development in zebrafish". Physiological Reports. 4 (19). doi:10.14814/phy2.12940. PMC 5064130Freely accessible. PMID 27688432. 
  10. ^ Okada T, Islam MR, Tsiferova NA, Okada Y, Sabirov RZ (March 2017). "Specific and essential but not sufficient roles of LRRC8A in the activity of volume-sensitive outwardly rectifying anion channel (VSOR)". Channels. 11 (2): 109–120. doi:10.1080/19336950.2016.1247133. PMID 27764579. 
  11. ^ Lutter D, Ullrich F, Lueck JC, Kempa S, Jentsch TJ (March 2017). "Selective transport of neurotransmitters and modulators by distinct volume-regulated LRRC8 anion channels". Journal of Cell Science. 130 (6): 1122–1133. doi:10.1242/jcs.196253. PMID 28193731. 
  12. ^ Planells-Cases R, Lutter D, Guyader C, Gerhards NM, Ullrich F, Elger DA, Kucukosmanoglu A, Xu G, Voss FK, Reincke SM, Stauber T, Blomen VA, Vis DJ, Wessels LF, Brummelkamp TR, Borst P, Rottenberg S, Jentsch TJ (December 2015). "Subunit composition of VRAC channels determines substrate specificity and cellular resistance to Pt-based anti-cancer drugs". The EMBO Journal. 34 (24): 2993–3008. doi:10.15252/embj.201592409. PMC 4687416Freely accessible. PMID 26530471. 
  13. ^ Sawada A, Takihara Y, Kim JY, Matsuda-Hashii Y, Tokimasa S, Fujisaki H, Kubota K, Endo H, Onodera T, Ohta H, Ozono K, Hara J (December 2003). "A congenital mutation of the novel gene LRRC8 causes agammaglobulinemia in humans". The Journal of Clinical Investigation. 112 (11): 1707–13. doi:10.1172/JCI18937. PMID 14660746. 

Further reading[edit]

  • Eggermont J, Trouet D, Carton I, Nilius B (2001). "Cellular function and control of volume-regulated anion channels". Cell Biochemistry and Biophysics. 35 (3): 263–74. doi:10.1385/CBB:35:3:263. PMID 11894846. 
  • Mongin AA (March 2016). "Volume-regulated anion channel--a frenemy within the brain". Pflugers Archiv. 468 (3): 421–41. doi:10.1007/s00424-015-1765-6. PMC 752865Freely accessible. PMID 26620797. 
  • Nagase T, Kikuno R, Ishikawa KI, Hirosawa M, Ohara O (February 2000). "Prediction of the coding sequences of unidentified human genes. XVI. The complete sequences of 150 new cDNA clones from brain which code for large proteins in vitro". DNA Research. 7 (1): 65–73. doi:10.1093/dnares/7.1.65. PMID 10718198. 
  • Kubota K, Kim JY, Sawada A, Tokimasa S, Fujisaki H, Matsuda-Hashii Y, Ozono K, Hara J (April 2004). "LRRC8 involved in B cell development belongs to a novel family of leucine-rich repeat proteins". FEBS Letters. 564 (1-2): 147–52. doi:10.1016/S0014-5793(04)00332-1. PMID 15094057. 
  • Smits G, Kajava AV (July 2004). "LRRC8 extracellular domain is composed of 17 leucine-rich repeats". Molecular Immunology. 41 (5): 561–2. doi:10.1016/j.molimm.2004.04.001. PMID 15183935. 
  • Otsuki T, Ota T, Nishikawa T, Hayashi K, Suzuki Y, Yamamoto J, Wakamatsu A, Kimura K, Sakamoto K, Hatano N, Kawai Y, Ishii S, Saito K, Kojima S, Sugiyama T, Ono T, Okano K, Yoshikawa Y, Aotsuka S, Sasaki N, Hattori A, Okumura K, Nagai K, Sugano S, Isogai T (2007). "Signal sequence and keyword trap in silico for selection of full-length human cDNAs encoding secretion or membrane proteins from oligo-capped cDNA libraries". DNA Research. 12 (2): 117–26. doi:10.1093/dnares/12.2.117. PMID 16303743. 
  • Olsen JV, Blagoev B, Gnad F, Macek B, Kumar C, Mortensen P, Mann M (November 2006). "Global, in vivo, and site-specific phosphorylation dynamics in signaling networks". Cell. 127 (3): 635–48. doi:10.1016/j.cell.2006.09.026. PMID 17081983.